Post-hole digger.



No, 843,800. PATENTED FEB.12, 1907.

J. S. BURNING.

POST HOLE BIGGER.

APPLIUATION FILED APE.25,1906.

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UNITED PATENT OFFIIQE.

JOSEPH S. DURNING, OF AVALON, PENNSYLVANIA, ASSIGNOR TO JACOB O. BOWER, OF AVALON, PENNSYLVANIA.

POST-=HOLE DEGGER.

Application filecl April 25, 1906. Serial No; 313,550.

T 0 all whom, it TIMI/y concern:

Be it known that I, Josnrn S. BURNING, of Avalon, in the county of Allegheny, State of Pennsylvania, have invented a certain new and useful Improvement in Post-Hole Diggers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a view of the blank from which the bucket of the digger is formetl. Fig.2 is a sitle elevation of the bucket of the digger.

Fig. 3 is a perspective view of the digger, and Fig. 4 is a bottom view of the same.

My invention relates to an improvement in post-hole augers or diggers and it consists in a digger having a bucket formezl vith alternate cutters and lifters, as is hereinafter more fully set forth.

In the drawings, A represents the blank, formed of sheet metal having two or more series of teeth a b arrangen at suitable intervals along its lower etige, there being preferably three sets of teeth, the teeth a Z) being separated from each other by the narrow vertical slot 0. This blank A having been cut or otherwise formerl in the desirei shape is bent by any suitable means into the form of a cylinder A, as shown in Fig. 2, and the teeth 6 are bent inwardly, forming the lifters I), while the teeth a. are allowetl to remain on a line with the circumference of the bucket A, thus forming the cutters a. The cutters (1. are rlesignezl to cut the earth on a line wi h the circumference of the bucket of the digger, while the lifters I), being bent inwardly, serve to cut, scoop, and lift the earth within the cylindrical bucket. Near the top of the blank A and rivet-holes e e (Z (Z, through which, after the blank has been bent into cylindrical form, rivets 6 pass, by means of which the yoke C is riveterl to the upper por- Specification of Letters Patent.

Patented Feb. 12, 1907.

tion of the bucket A, one arm of the yoke being secured to the cylindrical bucket, a rivet passing through the ear of the yoke in each sine of the vertical slot D, the purpose of which slot is to permit a certain amount of spring in the cylinder. The other arm of the yoke O is secured to the bucket A by rivets passing through the rivet-holes (Z. The effect of this relative arrangement of the yoke and cylinder is to afl'orrl absolute stiffness to the upper portion of the cylinder without interfering with the necessary spring at the lower 13 art. At the up}; er portion of the yoke Ois the socket E. Fitting in this socket and riveteri thereto is the hanrile-rori F. At the top of the rod F is a two-armed socketiece G, the sockets of which are threaded to receive the cross-bars g g. The rod F and cross-bars G may be formed of pipe.

The advantages of my invention will be appreciated by those skillen in the art.

Having thus described my invention, What I claim, and'riesire to secure by Letters Patent, is

1. A nost-hole-rligger blank having a plurality of series of teeth, the teeth being separated from each other by narrow vertical slots and. the series being separated from each other by greater intervalsv 2. In a post-hole-tiigger having a cylindrical bucket formetl of a single piece of metal, an-i having a plurality of series of teeth, each series being composed of a cutting-tooth and a lifting-tooth, the series being sep arated from each other by an interval.

In testimony whereof I have hereunto set my hand.

JOSEPH S. BURNING.

Witnesses:

JAMEs K. BAKEWELL, C. E. Eeenns. 

